BMI Calculator — Stone & KG
Enter your height and weight below to instantly calculate your Body Mass Index (BMI). You can natively toggle your weight input between kilograms (kg) and stones (st)!
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Understanding BMI Ranges
The Body Mass Index (BMI) is a standardized metric used globally by health organizations like the NHS and WHO to categorize weight relative to height.
- Under 18.5 (Underweight) Being underweight could be a sign you're not eating enough or may be ill.
- 18.5 to 24.9 (Healthy Weight) Keep up the good work! This is the ideal range for optimal health.
- 25.0 to 29.9 (Overweight) You are carrying extra weight. Consider adopting a healthier diet.
- 30.0 and above (Obese) You are at higher risk for health problems such as heart disease.
Frequently Asked Questions
How is BMI calculated?
BMI is calculated by dividing your weight in kilograms by the square of your height in meters (kg / m²).
What is a healthy BMI?
A healthy BMI typically falls between 18.5 and 24.9. Anything below is considered underweight, 25-29.9 is overweight, and 30 or above is obese.
Does BMI apply perfectly to everyone?
While a good general metric, BMI does not distinguish between muscle and fat. Highly muscular athletes may falsely register as overweight.